JP4316076B2 - Composite parts repair equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite material parts repairing apparatus that facilitates layup and bagging work of repair patches, and enables reuse of members used for repair.
[0002]
[Prior art]
FIG. 6 shows an example of a composite part repair device for curing a repair patch for a conventional composite part. The composite material part repair device 1 shown in FIG. 6 is provided around the vacuum bag material 4 and the vacuum bag material 4 arranged so as to cover the repair patch 3 provided at the repair site 2 a of the composite material part 2. A sealant material 6 that forms a sealed space 5 between the composite part 2 including the repair patch 3 and the vacuum bag material 4, a heat blanket 7 disposed in the sealed space 5 in the vacuum bag material 4, and this heat blanket 7 and a bleeder material 9 disposed below the heat blanket 7.
[0003]
In order to repair the repair part 2a of the composite material part 2 using the composite material part repairing apparatus 1, first, the part corresponding to the repair part 2a of the composite material part 2 is removed, and the repair part 2a of the composite material part 2 is removed. The prepreg repair patch 3 is set on the adhesive.
[0004]
Next, the perforated release film 10 is disposed on the composite material part 2 to be repaired, the bleeder material 9 is disposed on the perforated release film 10, and the edge breather 11, 11 and the release film 12, the heat blanket 7 is disposed, and the breather 8 is disposed on the heat blanket 7.
[0005]
Next, the whole is covered with the vacuum bag material 4, and the sealed space 5 is formed between the composite material component 2 and the vacuum bag material 3 by the sealant material 6 disposed around the vacuum bag material 4.
[0006]
Next, the sealed space 5 is evacuated by a vacuum device (not shown), and the heat blanket 7 is heated by energizing the heat wire embedded in the heat blanket 7. Heating of the heat blanket 7 is controlled by a heat blanket controller 13 connected to the heat blanket 7. The repair patch 3 is heated and cured by the amount of heat generated by the heat blanket 7 controlled by the heat blanket controller 13, and the repair patch 3 is coupled to the repair site 2 a of the composite part 2. Thereby, the repair of the composite material part 2 is completed.
[0007]
[Problems to be solved by the invention]
Conventional composite parts repair devices require a wide variety of secondary materials including vacuum bag materials, breathers, release films, bleeder materials and sealant materials, making repair patch layup and bagging work complicated. In addition, when the curved shape of the repaired part includes a small bend, it is difficult to hold the heat blanket in a shape that matches the curved shape of the repaired part, and a sufficient vacuum pressure is not applied to the repaired part. There is a problem that the quality of the repair department deteriorates.
[0008]
Also, in the conventional composite parts repair equipment, when repairing composite parts, the resin of the prepreg material adheres to most secondary materials, so most of the secondary materials used for repair are not reused. Since it is disposed of, there is a problem that the waste after repair increases.
[0009]
The present invention has been made in view of the above points, and an object of the present invention is to provide a composite part repairing apparatus that facilitates repair patch lay-up and bagging and reduces the amount of waste after repair.
[0010]
[Means for Solving the Problems]
The composite material part repairing apparatus of the present invention is such that the opening on one end side of the cylindrical portion of the apparatus main body is closed with a heat resistant elastic sheet, and the apparatus main body and the composite material part are provided by a sealing material provided so as to surround the heat resistant elastic sheet. A sealed space is formed between the air passage and the air passage formed in the main body of the apparatus, the liquid is stored in the cylindrical portion, the liquid is heated by the heating device, and the sealed space is evacuated. Thus, the heat-resistant elastic sheet is brought into close contact with the repaired part of the composite part, and the repair patch provided at the repaired part of the composite part is heated and cured by the liquid heated by the heating device to fix the repair patch to the composite part. Repair composite parts by connecting them to the repair site.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
In FIG. 1, reference numeral 20 denotes a composite part repairing device according to the present invention, and this composite part repairing device 20 includes a device main body 23 having a frame 21 and a cylindrical portion 22.
[0013]
The frame 21 has a circular shape or a rectangular shape as viewed from above, and has a space 24 that opens upward and downward in the center. The space 24 is formed by a peripheral wall 25 having an inclined surface inclined inward from the upper end to the lower end. An air passage 26 is formed in the peripheral wall 25. The air passage 26 has one end communicating with the space 24 and the other end connected to a connection pipe (not shown). This connection pipe is connected to a vacuum device (not shown). A continuous string-like silicon seal material 27 is disposed around the entire lower surface of the frame 21 so as to surround the space 24.
[0014]
The cylindrical portion 22 has a flange portion 28 extending radially outward at the lower end. A heat resistant elastic sheet 29 is disposed on the lower surface of the flange portion 28. The cylindrical portion 22 is mounted on the support portion 30 formed on the upper surface of the frame 21 with the flange portion 28 interposed between the heat resistant elastic sheet 29 and attached to the frame 21 by a fixing means (not shown). The lower end opening of the cylindrical part 22 is closed by a heat-resistant elastic sheet 29, thereby forming a liquid storage space 31 inside the cylindrical part 22. A liquid 32 is stored in the liquid storage space 31. Since the liquid 32 may be heated to a temperature of 180 ° C. or higher, it is desirable that the liquid 32 is silicon oil having a characteristic that the flash temperature is higher than 300 ° C. Further, a heating device 33 for heating the liquid 32 is disposed in the cylindrical portion 22 so as to be movable in the vertical direction. The heating device 33 is attached to the inner surface of the cylindrical portion 22 via a silicon seal material 34 so as to be able to move while closing the cylindrical passage. The heating device 33 has a heater 35, and the heater 35 is connected to a heater controller 37 via a wiring 36.
[0015]
Furthermore, a thermometer 38 such as a thermocouple is disposed inside the cylindrical portion 22 so that the detection portion 38a is buried in the liquid 32 of the liquid storage portion 31. The temperature detection signal of the liquid 32 detected by the thermometer 38 is sent to the heater controller 37, and the temperature of the heater 35 of the heating device 33 is controlled by a control signal generated from the heater controller 37.
[0016]
As shown in FIG. 2, the composite part repairing device 20 is disposed on the damaged part 2a of the composite part 2 with the perforated release film 10 and the bleeder material 9 interposed therebetween, and the air passage 26 is not shown. Connect to the vacuum device via a connecting pipe.
[0017]
Next, the operation of the composite part repairing apparatus 20 of the present invention will be described with reference to FIGS.
[0018]
As a repair preparation stage of the damaged part of the composite material part 2, the damaged part corresponding to the repaired part 2a of the composite material part 2 is removed from the composite material part 2, and the repaired part 2a of the composite material part 2 is subjected to surface treatment and repaired. The prepreg repair patch 3 is set on the part 2a via an adhesive.
[0019]
Next, as shown in FIG. 2, a perforated release film 10 and a bleeder material 9 are arranged on the composite material part 2 including the prepreg repair patch 3, and the composite material part repair device 20 is arranged on the composite material part repair device 20. Arrange as shown. At this stage, the air passage 26 communicates with the atmosphere, the space 24 is the same as the atmospheric pressure, and the heat-resistant stretchable sheet 29 is in a horizontal position where the lower end opening of the cylindrical portion 22 is closed.
[0020]
Next, when the air passage 26 is connected to a vacuum device via a connection pipe (not shown) and the vacuum device is operated, evacuation of the air in the space 24 is started, as shown in FIG. The low-pressure state is established, and the heat-resistant stretchable sheet 29 extends downward from the position shown in FIG. 3 to the position shown in FIG. As a result, the silicon oil 32 accommodated in the liquid accommodating space 31 of the cylindrical portion 22 also moves downward, but the heat resistant stretchable sheet 29 is entirely supported by the flange portion 28 of the cylindrical portion 22 and the support portion of the frame 21. Since the seal bonding is performed by 30, the silicon oil 32 does not leak to the outside due to the expansion and contraction of the heat-resistant elastic sheet 29.
[0021]
Further, when the operation of the vacuum device is continued, the air in the space 24 is further evacuated, and as shown in FIG. 5, the air pressure in the space 24 is in a vacuum state. It extends further downward and adheres onto the composite material part 2 including the prepreg repair patch 3.
[0022]
Next, when the heater controller 37 is operated, the heater 35 of the heating device 33 arranged inside the cylindrical portion 22 generates heat, and is stored in the liquid storage space 31 of the cylindrical portion 22 by the heat generated from the heater 35. The silicon oil 32 thus heated is heated to a temperature of 120 ° C. or higher necessary for curing the prepreg repair patch 3. Since the heat-resistant elastic sheet 29 is in close contact with the composite material part 2 including the prepreg repair patch 3, the heat of the silicone oil 32 heats the prepreg repair patch 3 to a curing temperature or higher, Harden. Thereby, the prepreg repair patch 3 is integrally coupled to the repair site 2a of the composite material part 2, and the repair of the composite material part 2 is completed.
[0023]
After the composite material part 2 is repaired, the composite material part repair device 20 is brought into the state shown in FIG. 3 by stopping the operation of the heater controller 37 to lower the temperature of the silicon oil 32 and stopping the operation of the vacuum device. Returned.
[0024]
【The invention's effect】
As described above, according to the present invention, the heat-resistant elastic sheet that closes the open end of the cylindrical portion is brought into close contact with the composite part including the repair patch by vacuum drawing, and the heat of the liquid contained in the cylindrical portion is used. The repair patch is heat-cured, making repair patch lay-up and bagging easier, and even if the curved surface of the repair site contains a small bending radius, the heat-resistant elastic sheet is matched to the curved shape of the repair site. Since the vacuum pressure is sufficiently applied to the repair site, the quality of the repair part of the composite material part is improved, and the waste after repair is reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a composite part repair device according to the present invention.
FIG. 2 is a diagram showing a use state of a composite material parts repair device according to the present invention.
FIG. 3 is a view showing a state in which the composite material repair device according to the present invention is installed in a composite material to be repaired.
4 is a view showing a state in which a part of air is evacuated from the sealed space of the composite part repairing apparatus shown in FIG. 3;
5 is a view showing a state in which air is completely evacuated from the sealed space of the composite part repairing device shown in FIG. 3;
FIG. 6 is a view showing a conventional composite material parts repair device.
[Explanation of symbols]
20 Composite material parts repair device 21 Frame 22 Cylindrical portion 23 Device body 24 Space 26 Air passage 27 Silicon seal material 29 Heat-resistant elastic sheet 31 Liquid storage space 32 Liquid 33 Heating device

Claims (4)

An apparatus main body having a cylindrical portion that is open at both ends, a heat-resistant elastic sheet that closes one end of the cylindrical portion of the apparatus main body, and a heat-resistant elastic sheet that surrounds the end surface on the one end side of the apparatus main body. A sealing material, an air passage that is formed in the apparatus main body and communicates with a space surrounded by the sealing material, a liquid contained in the cylindrical portion, and a heating device that heats the liquid that is disposed inside the cylindrical portion and accommodated An apparatus for repairing composite material parts, comprising: 2. The composite part repairing apparatus according to claim 1, wherein the liquid is silicon oil. The composite part repairing device according to claim 1, further comprising a suction device that is connected to an air passage of the device main body and sucks air. 2. The composite part repairing device according to claim 1, wherein the heating device seals the other end side of the cylindrical portion and is movably disposed along the inner surface.

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